100 years--and counting--at the South Pole (photos)

'Polheim'

Wednesday marks the 100th anniversary of explorer Roald Amundsen becoming the first to reach the South Pole. In this image Amundsen, Helmer Hanssen, Sverre Hassel and Oscar Wisting (left to right) are pictured at "Polheim," the tent erected at the South Pole on December 16, 1911. The top flag is the Flag of Norway; the bottom is marked "Fram."

Amundsen disappeared aboard a French Latham 47 flying boat in the Barents Sea on June 18, 1928. The plane had been searching for the gas-filled airship "Italia," which crashed when returning from the North Pole during an expedition led by Italian aeronautical engineer Umberto Nobile.

Photo by: Olav Bjaaland./ Wikipedia

Framheim base

The base at Framheim, February 1911.

Photo by: Wikipedia

Ice sheet two miles thick

Over the decades, scientists and support personnel have conducted research at the South Pole on myriad projects. But the conditions are anything but balmy as evidenced by this 1960 photo. The ice sheet below South Pole is nearly two miles thick.

Photo by: U.S. Navy NAVFAC Archives

Dropping lumber

A C-124 Cargo plane airdrops lumber to U.S. Navy Seabees at the South Pole, December 1956 as they went about the construction of a research station.

Photo by: Dick Prescott National Science Foundation

First permanent station

A December 4, 1956 aerial view of the first permanent station at the South Pole.

Photo by: Dick Prescott, National Science Foundation

First plane to land

This C-47 was the first airplane to land at the South Pole on October 31, 1956.

Photo by: Dave Grisez, National Science Foundation

Navy Seabees

Group shot of the U.S. Navy Seabees who built the first South Pole station. Work was completed in late December 1956.

South Pole Telescope

Martin Pomerantz

The South Pole offers six months of constant sunlight for studying the sun. This 1985 image shows researcher Martin Pomerantz at the Pole.

Photo by: Ann Hawthorne, National Science Foundation

Amundsen-Scott South Pole Station

Weather balloons launched at Amundsen-Scott South Pole Station. The base was named in honor of two explorers. Norwegian Roald Amundsen led the first successful expedition to the South Pole 100 years ago. The other half of the base's name was in memory of British explorer Robert Falcon Scott, who lost the race against Amundsen and arrived at the South Pole more than month later, only to find Amundsen's tent, a Norwegian flag and a letter from Amundsen. Scott and four companions died on the way out.

Photo by: Calee Allen, National Science Foundation

Dome of South Pole Station

Dome of the South Pole Station, which was completed in 1975.

Photo by: National Science Foundation

Geodisc dome

1993 overhead shot of the geodisc dome and support tunnels at the South Pole Station.

Photo by: U.S. Navy

Dome entrance

The entrance to the dome filled up with snow and ice accumulation, as demonstrated in this 1975 photo. It ultimately required the digging of an access tunnel.

Photo by: Peter West, National Science Foundation

Jamesway huts

Korean War vintage Jamesway huts.

Photo by: Patrick Hovey, National Science Foundation

Remembering Reagan

U.S. flag, backlit by Southern Lights, flies at half staff in June 2004 in memory of former President Ronald Reagan. The flag was also lowered after the 9/11 terror attacks and the Space Shuttle Columbia loss in 2003.